Go to > System Tools > Firmware Upgrade (or look at the Status page).
turn off the power or disconnect the Ethernet cable during the upgrade process. Doing so can brick the router. The router will take roughly 2-3 minutes to update and automatically reboot. tp+link+router+firmware+update+tlwr840n+best
Before touching any files or cables, preparation is the most important phase of the process. The TL-WR840N is sensitive to errors, so follow these rules strictly. Go to > System Tools > Firmware Upgrade